Symantec’s antivirus software, Norton, has blocked thousands of emails in the 10 days since hackers leaked users’ personal data, including names, credit card details and site activity.

Emails with subject lines like “How to check if you were exposed in Ashley Madison hack” and “Ashley Madison hacked, is your spouse cheating?” try to entice concerned customers to click.

Although this isn’t the first time Symantec has noticed spammers using the site, the activity has soared since the hack:

Given the nature of its business, Ashley Madison has always been the subject of some spam activity. For example, one campaign which began on 1 July, before news of the breach emerged, featured a subject line of “pending message from ashleymadison.com”. However, recent weeks have seen a spike above this baseline of activity.

Domains that have been blocked include:

ashleymadisonlegalaction.com

ashleymadisonlistleak.com

checkashleymadison.com

ismyhusbandonashleymadison.com

Symantec advises consumers to be “very wary” of any emails purporting to be from Ashley Madison, or about the hack:

Do not pay anyone offering to remove personal details from the leaked data, since this cannot be done. This information is already in the public domain and multiple copies exist.